A new core–shell catalyst (Pt/Al₂O₃@ZIF-67) for selective hydrogenation of alkenes was prepared by coating platinum/alumina (Pt/Al₂O₃) core with ZIF-67 shell membrane. The aperture size of the ZIF-67 (0.34 nm) is sufficiently small thus exclude large reactant and toxic substances thereby preventing deactivation and leakage of noble metal (Pt) incorporated in the core. The Pt/Al₂O₃@ZIF-67 core−shell catalyst exhibited exceptional size-selective catalytic properties in hydrogenation reaction. The core-shell catalyst is selective toward alkenes (hexene 0.17 nm, cyclohexene 0.42 nm, cyclooctene 0.55 nm), and showed excellent resistance to sulfur poisoning. The Pt/Al₂O₃@ZIF-67 core−shell catalyst displayed outstanding stability and maintain high activity and selectivity after four subsequent working cycles. The conversion of hexene reached 100% at 200 °C, while the conversion of cyclohexene and cyclooctene was 40% and 10%, respectively.

通过用ZIF-67壳膜涂覆铂/氧化铝（Pt / Al ₂ O ₃）核，制备了用于烯烃选择性加氢的新型核-壳催化剂（Pt / Al ₂ O ₃ @ ZIF-67）。ZIF-67的孔径尺寸（0.34 nm）足够小，因此排除了较大的反应物和有毒物质，从而防止了掺入铁芯的贵金属（Pt）失活和泄漏。Pt / Al ₂ O ₃ @ ZIF-67核壳催化剂在氢化反应中表现出出色的尺寸选择性催化性能。核-壳催化剂对烯烃（己烯0.17 nm，环己烯0.42 nm，环辛烯0.55 nm）具有选择性，并显示出优异的抗硫中毒性。Pt / Al ₂在随后的四个工作循环后，O ₃ @ ZIF-67核壳催化剂表现出出色的稳定性，并保持高活性和选择性。在200°C下己烯的转化率达到100％，而环己烯和环辛烯的转化率分别为40％和10％。